Gas-controlling device for stoves.



J. E. KENNEDY.

GAS CONTROLLING DEVICE FOR STOVES.

APPLICATION FILED DEC. 9. i914.

1,18%,383. Patented May 9,1916.

MAI-E... l 1

. m3 r W inn GAS-CONTROLLING DEVICE FOR STOVES.

To all whom it may concern Be it known thatI, Jaime residing atlVashington, District of Columbia, have invented certain new and useful.Improvements in Gas-Controlling Devices for Stoves, of which thefollowing is a specification. 3

This invention relates to gas controlling devices for stoves,particularly gas ranges and the like, the primary object of theinvention in its broad aspect being to provide a device whereby thesupply of gas to the burner and the ignition thereof at the burnerwillbe controlled by placing a vessel upon, or removing same from thestove.

The invention is an improvement upon that shown, described and claimedin Letters Patent 1,070,812 granted to me -Aug. 19, 1913 and LettersPatent No. 1,151,108, granted to me AugustQ l, 1915, the primary objectof the present invention as distin guished from the. invention disclosedin the aforesaid Letters Patentis the provision of means for controllingthe supply of gas through mechanism operated by the placing of a vesselupon, or removal from the stove, without imparting any movement to thepilot light tube, to obviate any danger of extinguishing of the pilotlight when the mechanism is operated. i 2

A further object of thepresent invention is to provide injuxtapositionto the burner cock, a regulating valve for the pilot light by means ofwhich the amount of, gas ad" mitted to the pilot light tube can bevariedat will, and, when desired, a sufiicient amount of gas admitted to suchtube or pipe.

as to permit of utilizing of the pilot light as a simmer burner,obviating the necessity of providing a separateburner for this purposeon thestove.

Another object is the provision of a filtering medium for the pilotlight tube for purifying the gas before the samereaches the tip byabsorbing from the gas any moisture or foreign 'matter, the filteringmedium in the present invention being 10- cated at a point remote fromthe flame and consequently notsubjected to the heat of the latter, thusprotecting the filtering me dium for rapid deterioration. The locationof the filteringmedium moreover provides for easy renewing of the samewhen necessary.

Specification of Letters Patent.

E. Kinmnnv,v a citizen of the United States of America,

Patented May 9, 1916.,

Application filed December a, 1914. senaino'. 876,296.

A still further object of the present in vention is to so mount thepilot light tipv upon the pilot light tube as to permit of its beingreadily moved or adjusted to bring itinto the desired proximity withi-ela-tionto the burner proper, Without necessitating any change oralteration in the position of the pilot light tube itself.

Other minor objects are sought by the presentinvention, all of whichwill be hereinafter more specifically described and then claimed,without however confining myself to the precise construction shown anddescribed, as various slight changes may be made in the details ofconstruction without departing from the general spirit thereof and thescope of the same as claimed.

In describingthe invention in detail, reference will. be had to theaccompanying drawings illustrating a practical and pre- .ferredembodiment of the invention, like slides on said tube, also showing aportionv of the operating lever for the bracket' Fig. 1. is a transversevertical sectional view through the bracket shown in F 1g. 3 and thepilot l1ght,tube,,the operating lever for the bracket being shown inside elevation.-

Fig. 5 is a central longitudinal sectional view through the filteringmedium holder with which the pilot light tube is connected, showing apart of the coupling that connects same to the gas controlling cock.Figs. 6 and 7 are detail views in side elevation of the pilot light tubecoupling partly broken away, the regulating valve of such coupling beingin transverse section, Fig.6 showing the valve in fully opened position,and Fig; 7 showing the valve in closed position, and Fig. 8 isanenlarged sectional viewthrough the valve mechanism.

In the devices shown in the Letters Patent referredto, the pilot lighttube is connected at its rear end with the gas controlling cock, andintermediate its .ends has connection with the mechanism that isoperated by the placing upon, or removal ofa vessel from guished due toits rapid movement through the air. Furthermore, where the pilot lightflame is quite small and for this reason not plainly visible at thepilot light tip, the operator is sometimes in doubt Whether the pilotlight is extinguished or not, necessitating a manipulation of themechanism to determine such fact.

' Those parts of the present device which are the same in constructionas in the aforesaid patents it is not deemed necessary to describe indetail herein, and the same will therefore be described only generally.

In the present illustration 10 indicates generally, a stove embodying anupper or top plate 11 provided with apertures in which are mounted theusual grids 12, below each of which is a gas burner 14 supplied with gasthrough a burner pipe 15 fed from a supply pipe 16 in the usual manner,it being understood that for each gas burner 14 and burner'pipe 15employed, a separate or individual controlling cock 17 is pro vided. Thevalve member 18 of the controlling cock 17 employed in the presentinvention is of the same construction as is fully shown and described inLetters Patent 1,070,812 heretofore referred to, which provides for aflow of gas from the supply pipe 16tothe burner pipe 15 and burner 14when the valve 18,111 open position, and which prevents the gas from soflowing to the burner when the valve is in closed position, the valve 18however being so arranged and constructed that a constant supply of gasfrom the supply pipe 16 to the pilot tube is provided unless the passageway leading from the cock17 to the pilot light tube be closed'by amanually manipulated regulating valve to be hereinafter moreparticularly referred to. A manually operable valve 19 as usual isprovided for shutting off the flow of gas to the burner independently ofthe valve 18.

As heretofore stated, the pilot light tube in this construction remainsstationary, the valve 18 being operated by a member separate from thepilot light tube instead of by the latter as in my Patent No. 1.151.108.

This stationary mounting of the pilot light tubeenables me to dispensewith the supporting bracket necessary in the construction shown in saidPatent No. 1,151,108, since such tube is comparatively light in weightand its support at its inlet end is wholly sufiicient when no movementof the tube is required. This simplifies and materially cheapens thecost of manufacture.

Depending from the lower side of the casing of the cook 17 is apipecoupling-20, closed at its lower end and the passage 21 in whichcommunicates through passage 17 in the cock casing with the gas supplypipe 16. Tapped or threadedly connected with this pipe coupling'20 at ornear its lower end is a pipe 22 into the inner end of which thereceiving end of the pilot light tube 23 is received, preferably by athreaded engagement as shown.

The purpose of providing the pipe 22 instead of connecting the outer endof the pilot lighttube directly with the pipe coupling 20 is to providea suitable receptacle forthe filtering medium 24 such as cotton or thelike, with which the pipe 22 is more or lessfilled. By locating thisfiltering medium in a member separate from the pilot light tube and at apoint remote from the zone of heat from the burner, the material iswholly removed from the action of the heat thereon, thus materiallyincreasing the life of the filtering medium, necessitating vervinfrequent if any renewals.

The pilot light tube is extended underneath I the burner tube 15 andburner 14 and has its inner end bent upwardly within the central openingof said burner, and has mounted thereon, a burner tip 25, the purpose-ofthis particular form of tip being to provide such mixture of air and gasas to insure of a blue flame. In my Patent No. 1,122,944, December 29,1914, the burner tip is shown as threadedly-connected with the dischargeend of the pilot light tube. I prefer in using this tip with the presentinvention to simply sleeve it onto the discharge end of the pilot lighttube with a relatively tight fit as this enables me to readily adjustthe tip on the pilot light tube so as to bring the discharge end of suchtip into any desired as a simmer burner, I make the passageway 21in thepipe coupling 20and the port 27 in the valve 26, relatively large so asto admit a suflicient quantity of gas'for the purpose stated when it isdesired to so make use of the pilot light tube. A pin 29 car- 'ried bythe valve 26 works in a recess 30 provided therefore in the pipecoupling 20 and limits the movement of the valve in both directions, aswell as indicating, when at any point between the limits ofits'movement, the amount of opening of the valve 26.

For operating the valve 18 when a vessel is placed uponthe grid12, acounterbalanced operating member 31 is employed which is described indetail in my said Patent No. 1,151,108,including a cap to be engaged bythe vessel. This operating member like in said Patent No. 1,151,108 hasa loose connection at one end with the arm 32 of a bell-crank lever thatis mounted to swing on the under side ofthe stove top 11. The other arm33 of this bell-crank lever instead of being formed with ahead as insaid Patent No. 1,151,108 terminates in a hook or clevis 3a whichreceives the. pilot light tube 23 1 within a substantially U shapedbracket 35 that is adjustably mounted on a rod 36 carried by or securedto the lower end of a lever-arm 37 that is attached to the valve 18. Thebracket 35 is secured in adjusted position upon the rod as by a setscrew 38, binding the rod between it and a flange or lug 39 carried bythe bracket (see Fig. 4).

Such being the construction, the operation may be briefly stated asfollows: Assuming the device to be in the position shown in Fig. 1, thepilot light having been ignited, and the manually controlled valve 19being in open position, it will be evident that when a vessel is placedupon the conical cap of the operating member 31 the depression of saidcap by the weight of the vessel actuatesthe swinging bell-crank movingthe lower end of arm 33 outwardly and carrying therewith bracket 35 androd 36 so as to operate lever-arm 37 and open the valve 18 to admitgas-to the burner tube 15 and burner 14 where it is ignited by the pilotlight. Upon the removal of the vessel, the counterweight 40 returns theoperating member to elevated position, simultaneously actuating thebellcrank and rod 36 so as to close valve 18 and shut off the flow ofgas to the burner, the pilot light tube remaining stationary at alltimes whereby the flame of such pilot light is at no time in danger ofbeing extinguished.

By adjusting the position of the bracket 35 on the rod 36, and theresultant adjustment which is made to the long arm oi? the bell-crank,the extent to which the valve 18 will be opened or closed can be readilycontrolled to provide any desired flame at the burner.

The use of the pilot light as a simmer burner necessitates only theclosing of the valve 19 and the adjustment of valve 26 to permit thedesired flow of gas into the pilot light tube, the actuation of thevalve 18 by the operating member under these conditions having no efiecton the flow of gas.

lVhat I claim is I a cock between the burner andgas supply, a

controlling valve in said cook, a pilot light tube leading from saidcock and fixed beneath said burner, a bracket slidable on the pilotlight tube, an operative connection between the bracket and valve, anoperating member, and an operative connection between the bracket andoperating member.

3. In combination, a burner, a gas supply, a controlling valve in'thecook, a lever arm carried bythe valve, a slidable bracket, a rodconnected to the bracket and lever arm, an operating member, and anoperative connection between the bracket and the operating member.

4. In combination, a burner, a gas supply, a cock between the burner andgas supply, a controlling valve in said cock provided with a stem, alever arm fixed on said stem, a rod pivoted to the lever arm, a slidablymounted bracket connected to the rod, an operating member having one endfixed and the other end free and a bell crank lever having one armconnected to the bracket and the other arm connected to the free end ofthe operating member.

5. In combination, a burner, a gas supply, a cock between the burner,and gas supply, a controlling valve in said cock provided with a stem, alever arm fixed to said stem, a rod pivoted to the lever arm, a fixedpilot burner tube extending beneath the burner, a bracket slidablymounted on the tube and connected to the rod, an operating member havingone end fixed and the other free, and a bell crank lever having one armconnected to the bracket and the other arm connected to the free end ofthe operating member.

6. In combination, a burner, a gas supply, a cock for controlling thesupply of gas to the burner, a controlling valve in said cook, a pipecoupling with its passage in constant communication through the cockwith said gas supply, a pilot light tube connected with said couplingand in communication with said passage, a regulating valve in thecoupling for said passage, an operating member having one end fixed andthe other end free, a bracket slidably mounted on the pilot light tube,a rod connected to said bracket, an arm connected to the controllingvalve and rod, and a bell crank lever having one arm connectedto thebracket and the other arm connected to the free end of the operatingmember.

7. In combination, a burner, a gas sup ply, a cock between the burnerand gas supply, a contr lling valve in said Cook, a leverarm carried bythe cock, a rod connected to said levenarm, a bracket adjustably mountedon said rod, an operating-member,

and connections between the operating-member and bracket whereby theValve is oper-' with saidpilot light passage in the'cock, a

regulating valve for said passage in the coupling, a pilot light-tubeconnected with the coupling, a lever-arm carried by thecontrolling-valve, a counterbalanced operatingmembenand connectionsbetween the operatlng-meinber and the lever-arm for operating the valvewithout afi'ecting thepllot light tube. 3

In testimony whereof aflix 1ny.signature in presence of two Witnesses. v

JAMES E. KENNEDY.

l Vitnesses: i

' A. M. VVILSON,

G. NOTES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C. i i

